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Relationship between age-related gait adaptations and required coefficient of friction.

Authors
Kim-S; Lockhart-T; Yoon-HY
Source
Saf Sci 2005 Aug; 43(7):425-436
NIOSHTIC No.
20031237
Abstract
A laboratory study was conducted to evaluate if age-related gait adaptations in walking velocity, step length and heel contact velocity could adversely influence friction demand characteristics (i.e. RCOF) and the likelihood of slip initiation. Additionally, relationship between transitional acceleration of the whole body center-of-mass (COM) and friction demand was assessed between young and older participants. Fourteen younger (7 females and 7 males, 18-30 years old) and 14 older (7 females and 7 males, over 65 years old) adults participated in the study. While wearing a safety harness, all participants walked at their preferred gait speed for approximately 20 min on the linear walking track, and synchronized ground reaction forces and posture data were captured using the force plates and six infrared cameras, respectively. The results indicated that older adults walked slower with slower heel contact velocity, and produced lower friction demand (i.e. RCOF) in comparison to younger adults. However, ANCOVA indicated that the differences in heel contact velocity between the two age groups were due to effects of walking velocity. The multiple regression and bivariate regression analyses suggested that, for older adults, heel contact velocity was a predictor for the RCOF, whereas, for younger adults, walking velocity, step length and transitional acceleration of the whole body COM were the factors contributing to the RCOF. In conclusion, the present study suggested that gait adaptations among the elderly must be considered when predicting the likelihood of slip initiation
Keywords
Laboratory-work; Laboratory-testing; Demographic-characteristics; Age-factors; Sex-factors; Safety-equipment
CODEN
SSCIEO
Publication Date
20050801
Document Type
Journal Article
Email Address
lockhart@vt.edu
Funding Type
Grant
Fiscal Year
2005
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-T01-OH-008613
Issue of Publication
7
ISSN
0925-7535
Source Name
Safety Science
State
VA
Performing Organization
Department of Industrial and Systems Engineering, Virginia Tech University, Blacksburg, Virginia
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